I've uploaded and tagged the rest of my Hurst Castle pictures.
Keyhaven is a small town just south of the New Forest. There is a spit which reaches out into the Solent, toward the Isle of Wight. At the end of the Spit the Tudors built Hurst Castle. There is also a Lighthouse.

The Victorians later reinforced the castle as a defensive measure against the French. The castle was also used to guard the Solent during the second world war.